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Jiri Vajsar

TitleStaff Physician
InstitutionThe Hospital for Sick Children
DepartmentPAEDIATRIC CONSULTANTS
Address555 University Avenue
Toronto ON M5G 1X8
Phone416-813-1500
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    Publications listed below are automatically derived from MEDLINE/PubMed and other sources, which might result in incorrect or missing publications. Faculty can login to make corrections and additions.
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    1. Hodgkinson VL, Oskoui M, Lounsberry J, M'Dahoma S, Butler E, Campbell C, MacKenzie A, McMillan HJ, Simard L, Vajsar J, Brais B, Chapman KM, Chrestian N, Crone M, Dobrowolski P, Dojeiji S, Dowling JJ, Dupré N, Genge A, Gonorazky H, Hasal S, Izenberg A, Johnston W, Leung E, Lochmüller H, Mah JK, Marerro A, Massie R, McAdam L, McCormick A, Melanson M, Mezei MM, Nguyen CE, O'Connell C, O'Ferrall EK, Pfeffer G, Phan C, Plamondon S, Poulin C, Rodrigue X, Schellenberg KL, Selby K, Sheriko J, Shoesmith C, Smith G, Taillon M, Taylor S, Warman Chardon J, Worley S, Korngut L. A National Spinal Muscular Atrophy Registry for Real-World Evidence. Can J Neurol Sci. 2020 Jun 04; 1-6. PMID: 32493524.
      View in: PubMed
    2. Katzberg HD, Vajsar J, Vezina K, Qashqari H, Selvadurai S, Chrestian N, Khayat A, Ryan CM, Narang I. Respiratory Dysfunction and Sleep-Disordered Breathing in Children With Myasthenia Gravis. J Child Neurol. 2020 Aug; 35(9):600-606. PMID: 32484036.
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    3. Gonorazky HD, Dowling JJ, Volpatti JR, Vajsar J. Signs and Symptoms in Congenital Myopathies. Semin Pediatr Neurol. 2019 04; 29:3-11. PMID: 31060723.
      View in: PubMed
    4. Campbell C, Selby K, McMillan H, Vajsar J, Korngut L, Brais B, MacKenzie A, Oskoui M. Response to the Canadian Agency for Drugs and Technologies in Health and Institut national d'excellence en santé et en services sociaux decision regarding nusinersen for Spinal Muscular Atrophy. Can J Neurol Sci. 2018 09; 45(5):516-517. PMID: 30039778.
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    5. Gonorazky HD, Amburgey K, Yoon G, Vajsar J, Widjaja E, Dowling JJ. Subacute demyelinating peripheral neuropathy as a novel presentation of late infantile metachromatic leukodystrophy. Muscle Nerve. 2017 11; 56(5):E41-E44. PMID: 28667691.
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    6. Yea C, Bitnun A, Robinson J, Mineyko A, Barton M, Mah JK, Vajsar J, Richardson S, Licht C, Brophy J, Crone M, Desai S, Hukin J, Jones K, Muir K, Pernica JM, Pless R, Pohl D, Rafay MF, Selby K, Venkateswaran S, Bernard G, Yeh EA. Longitudinal Outcomes in the 2014 Acute Flaccid Paralysis Cluster in Canada. J Child Neurol. 2017 03; 32(3):301-307. PMID: 28193112.
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    7. Finkel RS, Chiriboga CA, Vajsar J, Day JW, Montes J, De Vivo DC, Yamashita M, Rigo F, Hung G, Schneider E, Norris DA, Xia S, Bennett CF, Bishop KM. Treatment of infantile-onset spinal muscular atrophy with nusinersen: a phase 2, open-label, dose-escalation study. Lancet. 2016 12 17; 388(10063):3017-3026. PMID: 27939059.
      View in: PubMed
    8. Jerber J, Zaki MS, Al-Aama JY, Rosti RO, Ben-Omran T, Dikoglu E, Silhavy JL, Caglar C, Musaev D, Albrecht B, Campbell KP, Willer T, Almuriekhi M, Çaglayan AO, Vajsar J, Bilgüvar K, Ogur G, Abou Jamra R, Günel M, Gleeson JG. Biallelic Mutations in TMTC3, Encoding a Transmembrane and TPR-Containing Protein, Lead to Cobblestone Lissencephaly. Am J Hum Genet. 2016 Nov 03; 99(5):1181-1189. PMID: 27773428.
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    9. Chrestian N, Vajsar J. Response. Neuromuscul Disord. 2016 06; 26(6):394. PMID: 27156502.
      View in: PubMed
    10. Chrestian N, McMillan H, Poulin C, Campbell C, Vajsar J. Hereditary neuropathy with liability to pressure palsies in childhood: Case series and literature update. Neuromuscul Disord. 2015 Sep; 25(9):693-8. PMID: 26189194.
      View in: PubMed
    11. Kava M, Chitayat D, Blaser S, Ray PN, Vajsar J. Eye and brain abnormalities in congenital muscular dystrophies caused by fukutin-related protein gene (FKRP) mutations. Pediatr Neurol. 2013 Nov; 49(5):374-8. PMID: 24139536.
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    12. VanderPluym J, Vajsar J, Jacob FD, Mah JK, Grenier D, Kolski H. Clinical characteristics of pediatric myasthenia: a surveillance study. Pediatrics. 2013 Oct; 132(4):e939-44. PMID: 24019417.
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    13. Christison-Lagay E, Dharia B, Vajsar J, Kim PC. Efficacy and safety of thoracoscopic thymectomy in the treatment of juvenile myasthenia gravis. Pediatr Surg Int. 2013 Jun; 29(6):583-6. PMID: 23423693.
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    14. Al-Zaidy SA, Baskin B, Hawkins C, Yoon G, Ray PN, Vajsar J. Milder phenotype of congenital muscular dystrophy in a novel POMT1 mutation. Muscle Nerve. 2012 May; 45(5):752-5. PMID: 22499106.
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    15. Willer T, Lee H, Lommel M, Yoshida-Moriguchi T, de Bernabe DB, Venzke D, Cirak S, Schachter H, Vajsar J, Voit T, Muntoni F, Loder AS, Dobyns WB, Winder TL, Strahl S, Mathews KD, Nelson SF, Moore SA, Campbell KP. ISPD loss-of-function mutations disrupt dystroglycan O-mannosylation and cause Walker-Warburg syndrome. Nat Genet. 2012 May; 44(5):575-80. PMID: 22522420.
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    16. Wang CH, Bonnemann CG, Rutkowski A, Sejersen T, Bellini J, Battista V, Florence JM, Schara U, Schuler PM, Wahbi K, Aloysius A, Bash RO, Béroud C, Bertini E, Bushby K, Cohn RD, Connolly AM, Deconinck N, Desguerre I, Eagle M, Estournet-Mathiaud B, Ferreiro A, Fujak A, Goemans N, Iannaccone ST, Jouinot P, Main M, Melacini P, Mueller-Felber W, Muntoni F, Nelson LL, Rahbek J, Quijano-Roy S, Sewry C, Storhaug K, Simonds A, Tseng B, Vajsar J, Vianello A, Zeller R. Consensus statement on standard of care for congenital muscular dystrophies. J Child Neurol. 2010 Dec; 25(12):1559-81. PMID: 21078917.
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    17. Katz SL, Gaboury I, Keilty K, Banwell B, Vajsar J, Anderson P, Ni A, Maclusky I. Nocturnal hypoventilation: predictors and outcomes in childhood progressive neuromuscular disease. Arch Dis Child. 2010 Dec; 95(12):998-1003. PMID: 20810397.
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    18. Kolski H, Vajsar J, Grenier D. Paediatric myasthenia: A moving target. Paediatr Child Health. 2010 Apr; 15(4):226. PMID: 21455466.
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    19. Hung RM, Yoon G, Hawkins CE, Halliday W, Biggar D, Vajsar J. Cap myopathy caused by a mutation of the skeletal alpha-actin gene ACTA1. Neuromuscul Disord. 2010 Apr; 20(4):238-40. PMID: 20303757.
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    20. Vajsar J, Baskin B, Swoboda K, Biggar DW, Schachter H, Ray PN. Walker-Warburg Syndrome with POMT1 mutations can be associated with cleft lip and cleft palate. Neuromuscul Disord. 2008 Aug; 18(8):675-7. PMID: 18640039.
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    21. Clement EM, Godfrey C, Tan J, Brockington M, Torelli S, Feng L, Brown SC, Jimenez-Mallebrera C, Sewry CA, Longman C, Mein R, Abbs S, Vajsar J, Schachter H, Muntoni F. Mild POMGnT1 mutations underlie a novel limb-girdle muscular dystrophy variant. Arch Neurol. 2008 Jan; 65(1):137-41. PMID: 18195152.
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    22. Kolski HK, Hawkins C, Zatz M, de Paula F, Biggar D, Alman B, Vajsar J. Diagnosis of limb-girdle muscular dystrophy 2A by immunohistochemical techniques. Neuropathology. 2008 Jun; 28(3):264-8. PMID: 18031465.
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    23. Sy K, Mahant S, Taback N, Vajsar J, Chait PG, Friedman JN. Enterostomy tube placement in children with spinal muscular atrophy type 1. J Pediatr. 2006 Dec; 149(6):837-9. PMID: 17137903.
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    24. Vajsar J, Schachter H. Walker-Warburg syndrome. Orphanet J Rare Dis. 2006 Aug 03; 1:29. PMID: 16887026.
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    25. Georgiou DM, Nicolaou P, Chitayat D, Koutsou P, Babul-Hirji R, Vajsar J, Murphy J, Christodoulou K. A novel GDAP1 mutation 439delA is associated with autosomal recessive CMT disease. Can J Neurol Sci. 2006 Aug; 33(3):311-6. PMID: 17001820.
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    26. Vajsar J, Zhang W, Dobyns WB, Biggar D, Holden KR, Hawkins C, Ray P, Olney AH, Burson CM, Srivastava AK, Schachter H. Carriers and patients with muscle-eye-brain disease can be rapidly diagnosed by enzymatic analysis of fibroblasts and lymphoblasts. Neuromuscul Disord. 2006 Feb; 16(2):132-6. PMID: 16427280.
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    27. Fehlings D, Vajsar J, Wilk B, Stephens D, Oded BO. Anaerobic muscle performance of children after long-term recovery from Guillain-Barré syndrome. Dev Med Child Neurol. 2004 Oct; 46(10):689-93. PMID: 15473173.
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    28. Lamont PJ, Thorburn DR, Fabian V, Vajsar J, Hawkins C, Saada Reisch A, Durling H, Laing NG, Nevo Y. Nemaline rods and complex I deficiency in three infants with hypotonia, motor delay and failure to thrive. Neuropediatrics. 2004 Oct; 35(5):302-6. PMID: 15534765.
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    29. Biggar WD, Politano L, Harris VA, Passamano L, Vajsar J, Alman B, Palladino A, Comi LI, Nigro G. Deflazacort in Duchenne muscular dystrophy: a comparison of two different protocols. Neuromuscul Disord. 2004 Sep; 14(8-9):476-82. PMID: 15336688.
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    30. Tarnopolsky MA, Mahoney DJ, Vajsar J, Rodriguez C, Doherty TJ, Roy BD, Biggar D. Creatine monohydrate enhances strength and body composition in Duchenne muscular dystrophy. Neurology. 2004 May 25; 62(10):1771-7. PMID: 15159476.
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    31. Schachter H, Vajsar J, Zhang W. The role of defective glycosylation in congenital muscular dystrophy. Glycoconj J. 2004; 20(5):291-300. PMID: 15229394.
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    32. Banwell BL, Mildner RJ, Hassall AC, Becker LE, Vajsar J, Shemie SD. Muscle weakness in critically ill children. Neurology. 2003 Dec 23; 61(12):1779-82. PMID: 14694046.
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    33. Ibrahim SH, Vajsar J, Jay V. Myopathy with Allgrove syndrome. J Pak Med Assoc. 2003 Dec; 53(12):619-21. PMID: 14765946.
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    34. Zhang W, Vajsar J, Cao P, Breningstall G, Diesen C, Dobyns W, Herrmann R, Lehesjoki AE, Steinbrecher A, Talim B, Toda T, Topaloglu H, Voit T, Schachter H. Enzymatic diagnostic test for Muscle-Eye-Brain type congenital muscular dystrophy using commercially available reagents. Clin Biochem. 2003 Jul; 36(5):339-44. PMID: 12849864.
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    35. Vajsar J, Fehlings D, Stephens D. Long-term outcome in children with Guillain-Barré syndrome. J Pediatr. 2003 Mar; 142(3):305-9. PMID: 12640380.
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    36. Al-Ruwaishid A, Vajsar J, Tein I, Benson L, Jay V. Centronuclear myopathy and cardiomyopathy requiring heart transplant. Brain Dev. 2003 Jan; 25(1):62-6. PMID: 12536036.
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    37. Sine SM, Shen XM, Wang HL, Ohno K, Lee WY, Tsujino A, Brengmann J, Bren N, Vajsar J, Engel AG. Naturally occurring mutations at the acetylcholine receptor binding site independently alter ACh binding and channel gating. J Gen Physiol. 2002 Oct; 120(4):483-96. PMID: 12356851.
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    38. Kolski HK, Kim PC, Vajsar J. Video-assisted thoracoscopic thymectomy in juvenile myasthenia gravis. J Child Neurol. 2001 Aug; 16(8):569-73. PMID: 11510927.
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    39. Jay V, Vajsar J. The dystrophy of Duchenne. Lancet. 2001 Feb 17; 357(9255):550-2. PMID: 11229686.
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    40. Kolski H, Vajsar J, Kim PC. Thoracoscopic thymectomy in juvenile myasthenia gravis. J Pediatr Surg. 2000 May; 35(5):768-70. PMID: 10813346.
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    41. Mullaney P, Vajsar J, Smith R, Buncic JR. The natural history and ophthalmic involvement in childhood myasthenia gravis at the hospital for sick children. Ophthalmology. 2000 Mar; 107(3):504-10. PMID: 10711889.
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    42. Vajsar J, Ackerley C, Chitayat D, Becker LE. Basal lamina abnormality in the skeletal muscle of Walker-Warburg syndrome. Pediatr Neurol. 2000 Feb; 22(2):139-43. PMID: 10738921.
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    43. Midroni G, de Tilly LN, Gray B, Vajsar J. MRI of the cauda equina in CIDP: clinical correlations. J Neurol Sci. 1999 Nov 15; 170(1):36-44. PMID: 10540034.
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    44. Bril V, Allenby K, Midroni G, O'Connor PW, Vajsar J. IGIV in neurology--evidence and recommendations. Can J Neurol Sci. 1999 May; 26(2):139-52. PMID: 10352875.
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    45. Tein I, Vajsar J, MacMillan L, Sherwood WG. Long-chain L-3-hydroxyacyl-coenzyme A dehydrogenase deficiency neuropathy: response to cod liver oil. Neurology. 1999 Feb; 52(3):640-3. PMID: 10025805.
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    46. Banwell BL, Becker LE, Jay V, Taylor GP, Vajsar J. Cardiac manifestations of congenital fiber-type disproportion myopathy. J Child Neurol. 1999 Feb; 14(2):83-7. PMID: 10073429.
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    47. Tse S, Saunders EF, Silverman E, Vajsar J, Becker L, Meaney B. Myasthenia gravis and polymyositis as manifestations of chronic graft-versus-host-disease. Bone Marrow Transplant. 1999 Feb; 23(4):397-9. PMID: 10100585.
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    48. Vajsar J, Balslev T, Ray PN, Siegel-Bartelt J, Jay V. Congenital cytoplasmic body myopathy with survival motor neuron gene deletion or Werdnig-Hoffmann disease. Neurology. 1998 Sep; 51(3):873-5. PMID: 9748045.
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    49. Vajsar J, Chitayat D, Becker LE, Ho M, Ben-Zeev B, Jay V. Severe classical congenital muscular dystrophy and merosin expression. Clin Genet. 1998 Sep; 54(3):193-8. PMID: 9788720.
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    50. Melendrez JL, MacMillan LJ, Vajsar J. Amplitudes of sural and radial sensory nerve action potentials in orthodromic and antidromic studies in children. Electromyogr Clin Neurophysiol. 1998 Jan-Feb; 38(1):47-50. PMID: 9532433.
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    51. Kanra G, Ozon A, Vajsar J, Castagna L, Secmeer G, Topaloglu H. Intravenous immunoglobulin treatment in children with Guillain-Barré syndrome. Eur J Paediatr Neurol. 1997; 1(1):7-12. PMID: 10728186.
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    52. Jay V, Vajsar J, Haslam R. Axonal neuropathy with perineurial hyperplasia: report of a case with multifocal involvement. J Child Neurol. 1996 Sep; 11(5):400-3. PMID: 8877609.
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    53. Vajsar J, Jay V, Babyn P. Infantile myositis presenting in the neonatal period. Brain Dev. 1996 Sep-Oct; 18(5):415-9. PMID: 8891240.
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    54. Vajsar J, Sloane A, MacGregor DL, Ronen GM, Becker LE, Jay V. Arthrogryposis multiplex congenita due to congenital myasthenic syndrome. Pediatr Neurol. 1995 Apr; 12(3):237-41. PMID: 7619191.
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    55. Vajsar J, Sloane A, Wood E, Murphy EG. Plasmapheresis vs intravenous immunoglobulin treatment in childhood Guillain-Barré syndrome. Arch Pediatr Adolesc Med. 1994 Nov; 148(11):1210-2. PMID: 7921126.
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    56. Sloane AE, Vajsar J, Laxer RM, Babyn PS, Murphy EG. Spontaneous non-traumatic anterior compartment syndrome with peroneal neuropathy and favorable outcome. Neuropediatrics. 1994 Oct; 25(5):268-70. PMID: 7885539.
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    57. Lin KY, Posnick JC, al-Qattan MM, Vajsar J, Becker LE. Fetal nerve healing: an experimental study. Plast Reconstr Surg. 1994 Jun; 93(7):1323-33. PMID: 8208799.
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    58. Vajsar J, Becker LE, Freedom RM, Murphy EG. Familial desminopathy: myopathy with accumulation of desmin-type intermediate filaments. J Neurol Neurosurg Psychiatry. 1993 Jun; 56(6):644-8. PMID: 8509778.
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    59. Vajsar J, Taylor MJ, MacMillan LJ, Murphy EG, Logan WJ. Somatosensory evoked potentials and nerve conduction studies in patients with Guillain-Barré syndrome. Brain Dev. 1992 Sep; 14(5):315-8. PMID: 1456386.
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    60. Scherg M, Vajsar J, Picton TW. A source analysis of the late human auditory evoked potentials. J Cogn Neurosci. 1989; 1(4):336-55. PMID: 23971985.
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    61. Picton TW, Vajsar J, Rodriguez R, Campbell KB. Reliability estimates for steady-state evoked potentials. Electroencephalogr Clin Neurophysiol. 1987 Mar; 68(2):119-31. PMID: 2435528.
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    62. Svatý J, Lehovský M, Vajsar J, Böhm J. [Acute infantile hemiplegia. Contribution of computer tomography]. Cesk Pediatr. 1984 May; 39(5):289-93. PMID: 6467437.
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    63. Lesný I, Vajsar J, Nikolaidu L, Dusák M, Havlicek I. [Measure of skin resistance (dermatophoria) in children with headaches (author's transl)]. EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb. 1979 Dec; 10(4):222-5. PMID: 119634.
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    64. Lesný I, Figar S, Vajsar J, Snoblová A, Nikolaidu L, Dusák M. [The relationship between dermatophoric curves and vasomotor reactions in children's cephalalgia (author's transl)]. Cas Lek Cesk. 1979 Apr 20; 118(16):500-3. PMID: 455371.
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    65. Lehovský M, Kraus J, Vajsar J, Tosnarová V. [Behaviour of monosynaptic spinal reflexes in the application of double stimuli in normal children]. Cesk Pediatr. 1976 Jul; 31(7):574-6. PMID: 963831.
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